1
|
Air quality assessment in biosphere reserves close to emission sources. The case of the Spanish "Tablas de Daimiel" national park. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 858:159818. [PMID: 36341854 DOI: 10.1016/j.scitotenv.2022.159818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Revised: 10/17/2022] [Accepted: 10/26/2022] [Indexed: 06/16/2023]
Abstract
This work shows that biosphere reserves, national parks and other protected natural areas require in situ tools to monitor and detect local and remote air pollution sources which are a threat to flora, fauna water and soil. Industries in surrounding areas, traffic and long-range transport of air pollution, can change with time and meteorology and so each national park should also have a historical database of the air quality in the site. This study reports surface measurements of ozone, NO, NO2, CO, SO2 and PM2.5 acquired from March 2020 to July 2021 in "Las Tablas de Daimiel", a wetland Mediterranean National Park bordered by different cities and new industries in the field of the revalorization of agricultural wastes. Simultaneous data from a background station in a rural area isolated from air pollution are considered as reference. Twelve campaigns of one week duration were also performed to sample air in sorbent tubes to analyse volatile organic compounds from anthropogenic sources. Data are discussed considering meteorology, especially wind speed and direction together with the assessment of back-trajectories of air masses from distant sources. The results show that the effects of pollution from local and faraway sources on air quality in the park were weak. Thus, except for the high levels of ozone, with a mean value of 71 μg.m-3, measured mass loadings for pollutants were low and not in exceedance of the air quality standards. Saharan dust events were frequent and contributed to PM2.5 levels in the site. NOx and SO2 average concentrations (3.2 and 0.4 μg.m-3, respectively) were below the recommended critical levels for vegetation and all the quantified VOCs were found in average concentration levels below 0.5 μg.m-3.
Collapse
|
2
|
CN46 Catheter-related venous thrombosis: Experience with blue advance peripherally inserted central catheter (PICC) in a day hospital during the pandemic. Ann Oncol 2022. [PMCID: PMC9472564 DOI: 10.1016/j.annonc.2022.07.371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
|
3
|
Impact of SARS-CoV-2 lockdown and de-escalation on air-quality parameters. CHEMOSPHERE 2021; 265:129027. [PMID: 33243576 PMCID: PMC7677078 DOI: 10.1016/j.chemosphere.2020.129027] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 11/12/2020] [Accepted: 11/16/2020] [Indexed: 06/02/2023]
Abstract
The SARS-CoV-2 health crisis has temporarily forced the lockdown of entire countries. This work reports the short-term effects on air quality of such unprecedented paralysis of industry and transport in different continental cities in Spain, one of the countries most affected by the virus and with the hardest confinement measures. The study takes into account sites with different sizes and diverse emission sources, such as traffic, residential or industrial emissions. This work reports new field measurement data for the studied pandemic period and assesses the air quality parameters within the historic trend of each pollutant and site. Thus, 2013-2020 data series from ground-air quality monitoring networks have been analysed to find out statistically significant changes in atmospheric pollutants during March-June 2020 due to this sudden paralysis of activity. The results show substantial concentration drops of primary pollutants, including NOx, CO, BTX, NMHC and NH3. Particulate matter changes were smaller due to the existence of other natural sources. During the lockdown the ozone patterns were different for each studied location, depending on the VOCs-NOx ratios, with concentration changes close to those expected from the historical series in each site and not statistically attributable to the health crisis effects. Finally, the gradual de-escalation and progressive increase of traffic density within cities reflects a slow recovery of primary pollutants. The results and conclusions for these cities, with different sizes and population, and specific emission sources, may serve as a behavioural model for other continental sites and help understand future crises.
Collapse
|
4
|
Potential application of yeasts from Ecuadorian chichas in controlled beer and chicha production. Food Microbiol 2020; 98:103644. [PMID: 33875226 DOI: 10.1016/j.fm.2020.103644] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Revised: 09/11/2020] [Accepted: 09/15/2020] [Indexed: 11/30/2022]
Abstract
The potential of yeasts isolated from traditional chichas as starter cultures, either for controlled production of the native beverage or for industrial beer production, has been investigated. Three S. cerevisiae strains and one T. delbrueckii strain isolated from four different Ecuadorian chichas were compared to ale and lager beer strains with respect to fermentation performance, sugar utilisation, phenolic off-flavour production, flocculation and growth at low temperature. Fermentations were performed in 15 °P all-malt wort and in a model chicha substrate at 12 °C and 20 °C. Tall-tube fermentations (1.5 L) were also performed with both substrates to assess yeast performance and beer quality. Among the strains tested, only one Ecuadorian S. cerevisiae strain was able to ferment the wort sugars maltose and maltotriose. Fermentations with all Ecuadorian strains were poor in wort at 12 °C relative to 20 °C, but were similar in model chicha substrate at both temperatures. The aromatic profile was different between species and strains. These results indicate the potential of yeasts derived from traditional Andean fermented beverages for commercial applications. One of the chicha strains demonstrated traits typical of domesticated brewery strains and could be suitable for ale fermentation, while the other strains may have potential for low-alcohol beer or chicha production.
Collapse
|
5
|
Motivational interviewing improves continuous positive airway pressure (cpap) adherence in patient with established cardiovascular diseases. Sleep Med 2019. [DOI: 10.1016/j.sleep.2019.11.048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
6
|
P1531Tailoring device settings in cardiac resynchronization therapy using electrograms from pacing electrodes. Europace 2017. [DOI: 10.1093/ehjci/eux158.157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
7
|
Biotechnological impact of stress response on wine yeast. Lett Appl Microbiol 2016; 64:103-110. [DOI: 10.1111/lam.12677] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Revised: 09/09/2016] [Accepted: 09/29/2016] [Indexed: 01/07/2023]
|
8
|
Efficacy and safety of D. pteronyssinus immunotherapy in local allergic rhinitis: a double-blind placebo-controlled clinical trial. Allergy 2016; 71:1057-61. [PMID: 27008542 DOI: 10.1111/all.12889] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/19/2016] [Indexed: 12/14/2022]
Abstract
The effects of allergen immunotherapy (AIT) on local allergic rhinitis (LAR) are largely unknown. We conducted the first randomized, double-blind, placebo-controlled (DBPC), phase II trial of D. pteronyssinus (DP) subcutaneous AIT (DP-AIT) on LAR (clinicaltrials.gov identifier: NCT02123316). Thirty-six LAR patients received Pangramin PLUS DP or placebo for 24 months. The primary endpoints were symptoms, medication scores, and medication-free days. The secondary included skin test, serum specific IgE and IgG4, nasal allergen provocation test (NAPT), and adverse events. AIT-DP produced significant improvements in both primary and secondary endpoints vs placebo. After 12 months of AIT-DP, we detected a significant and marked increase in allergen tolerance with negative NAPT in 50% of patients, and significant increases of serum sIgG4. Immunotherapy was well tolerated; no systemic reactions were reported. This study demonstrated that AIT-DP is a safe and clinically effective treatment for LAR, confirming that LAR is a new indication for AIT.
Collapse
|
9
|
PT222 Intracardiac Leiomyoma. A 28 Years Experience. Glob Heart 2016. [DOI: 10.1016/j.gheart.2016.03.567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
|
10
|
Performance of Dower's inverse transform and Frank lead system for Identification of Myocardial Infarction. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2016; 2015:4495-8. [PMID: 26737293 DOI: 10.1109/embc.2015.7319393] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
This study performs a comparison between Dower's inverse transform and Frank lead system for Myocardial Infarction (MI) identification. We have selected a set of relevant features for MI detection from the vectorcardiogram and used the lasso method after that to build a model for the Dower's inverse transform and one for the Frank leads system. Then we analyzed the performance between both models on MI detection. The proposed methods have been tested using PhysioNet PTB database that contains 550 records from which 368 are MIs. Two main conclusions are coming from this study. The first one is that Dower's inverse transform performs equally well than Frank leads in identification of MI patients. The second one is that lead positions have a large influence on the accuracy of MI patient identification.
Collapse
|
11
|
Guidelines for the use and interpretation of assays for monitoring autophagy (3rd edition). Autophagy 2016; 12:1-222. [PMID: 26799652 PMCID: PMC4835977 DOI: 10.1080/15548627.2015.1100356] [Citation(s) in RCA: 4041] [Impact Index Per Article: 505.1] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2015] [Accepted: 09/22/2015] [Indexed: 12/09/2022] Open
|
12
|
Poster session 3The imaging examinationP646Simulator-based testing of skill in transthoracic echoP647Clinical and echocardiographic characteristics of isolated left ventricular non-compactionP648Appropriate use criteria of transthoracic echocardiography and its clinical impact in an aged populationAnatomy and physiology of the heart and great vesselsP649Prevalence and determinants of exercise oscillatory ventilation in the EUROEX trial populationAssessment of diameters, volumes and massP650Left atrial remodeling after percutaneous left atrial appendage closureP651Global atrial performance with tyrosine kinase inhibitors in metastatic renal cell carcinomaP652Early right ventricular response to cardiac resynchronization therapy: impact on clinical outcomesP653Parameters of speckle-tracking echocardiography and biomechanical values of a dilative ascending aortaAssessments of haemodynamicsP654Right atrial hemodynamics in infants and children: observations from 3-dimensional echocardiography derived right atrial volumesAssessment of systolic functionP655One-point carotid wave intensity predicts cardiac mortality in patients with congestive heart failure and reduced ejection fractionP656Persistence of cardiac remodeling in adolescents with previous fetal growth restrictionP6572D speckle tracking-derived left ventricle global longitudinal strain and left ventricular dysfunction stages: a useful discriminator in moderate-to-severe aortic regurgitationP658Global longitudinal strain and strain rate in type two diabetes patients with chronic heart failure: relevance to circulating osteoprotegerinP659Analysis of left ventricular function in patients before and after surgical and interventional mitral valve therapyP660Left ventricular end-diastolic volume is complementary with global longitudinal strain for the prediction of left ventricular ejection fraction in echocardiographic daily practiceP661Left ventricular assist device, right ventricle function, and selection bias: the light side of the moonP662Assessment of right ventricular function in patients with anterior ST elevation myocardial infarction; a 2-d speckle tracking studyP663Right ventricular systolic function assessment in sickle cell anaemia using echocardiographyAssessment of diastolic functionP664Prognostic value of transthoracic cardiopulmonary ultrasound in cardiac surgery intensive care unitP665Comparative efficacy of renin-angiotensin system modulators on prognosis, right heart and left atrial parameters in patients with chronic heart failure and preserved left ventricular systolic functionP666Left atrial volume index is the most significant diastolic functional parameter of hemodynamic burden as measured by NT-proBNP in acute myocardial infarctionP667Preventive echocardiographic screening. preliminary dataP668Assessment of the atrial electromechanical delay and the mechanical functions of the left atrium in patients with diabetes mellitus type IIschemic heart diseaseP669Coronary flow velocity reserve by echocardiography as a measure of microvascular function: feasibility, reproducibility and agreement with PET in overweight patients with coronary artery diseaseP670Influence of cardiovascular risk in the occurrence of events in patients with negative stress echocardiographyP671Prevalence of transmural myocardial infarction and viable myocardium in chronic total occlusion (CTO) patientsP672The impact of the interleukin 6 receptor antagonist tocilizumab on mircovascular dysfunction after non st elevation myocardial infarction assessed by coronary flow reserve from a randomized studyP673Impact of manual thrombus aspiration on left ventricular remodeling: the echocardiographic substudy of the randomized Physiologic Assessment of Thrombus Aspirtion in patients with ST-segment ElevatioP674Acute heart failure in STEMI patients treated with primary percutaneous coronary intervention is related to transmural circumferential myocardial strainP675Long-term prognostic value of infarct size as assessed by cardiac magnetic resonance imaging after a first st-segment elevation myocardial infarctionHeart valve DiseasesP676Prognostic value of LV global longitudinal strain in aortic stenosis with preserved LV ejection fractionP677Importance of longitudinal dyssynchrony in low flow low gradient severe aortic stenosis patients undergoing dobutamine stress echocardiography. a multicenter study (on behalf of the HAVEC group)P678Predictive value of left ventricular longitudinal strain by 2D Speckle Tracking echocardiography, in asymptomatic patients with severe aortic stenosis and preserved ejection fractionP679Clinical and echocardiographic characteristics of the flow-gradient patterns in patients with severe aortic stenosis and preserved left ventricular ejection fractionP6802D and 3D speckle tracking assessment of left ventricular function in severe aortic stenosis, a step further from biplane ejection fractionP681Functional evaluation in aortic stenosis: determinant of exercise capacityP682Left ventricular mechanics: novel tools to evaluate left ventricular function in patients with primary mitral regurgitationP683Plasma B-type natriuretic peptide level in patients with isolated rheumatic mitral stenosisP684Quantitative assessment of severity in aortic regurgitation and the influence of elastic proprieties of thoracic aortaP685Characterization of chronic aortic and mitral regurgitation using cardiovascular magnetic resonanceP686Functional mitral regurgitation: a warning sign of underlying left ventricular systolic dysfunction in heart failure with preserved ejection fraction.P687Secondary mitral valve tenting in primary degenerative prolapse quantified by three-dimensional echocardiography predicts regurgitation recurrence after mitral valve repairP688Advanced heart failure with reduced ejection fraction and severe mitral insufficiency compensate with a higher oxygen peripheral extraction to a reduced cardiac output vs oxygen uptake response to maxP689Predictors of acute procedural success after percutaneous mitraclip implantation in patients with moderate-to-severe or severe mitral regurgitation and reduced ejection fractionP690The value of transvalvular gradients obtained by transthoracic echocardiography in estimation of severe paravalvular leakage in patients with mitral prosthetic valvesP691Characteristics of infective endocarditis in a non tertiary hospitalP692Infective endocarditis: predictors of severity in a 3-year retrospective analysisP693New echocardiographic predictors of early recurrent mitral functional regurgitation after mitraclip implantationP694Transesophageal echocardiography can be reliably used for the allocation of patients with severe aortic stenosis for tras-catheter aortic valve implantationP695Annular sizing for transcatheter aortic valve selection. A comparison between computed tomography and 3D echocardiographyP696Association between aortic dilatation, mitral valve prolapse and atrial septal aneurysm: first descriptive study.CardiomyopathiesP698Cardiac resynchronization therapy by multipoint pacing improves the acute response of left ventricular mechanics and fluid dynamics: a three-dimensional and particle image velocimetry echo studyP699Long-term natural history of right ventricular function in dilated cardiomyopathy: innocent bystander or leading actor?P700Right to left ventricular interdependence at rest and during exercise assessed by the ratio between pulmonary systolic to diastolic time in heart failure reduced ejection fractionP701Exercise strain imaging demonstrates impaired right ventricular contractile reserve in patients with hypertrophic cardiomyopathyP702Prevalence of overt left ventricular dysfunction (burn-out phase) in a portuguese population of hypertrophic cardiomyopathy, a multicentre studyP703Systolic and diastolic myocardial mechanics in hypertrophic cardiomyopathy and their link to the extent of hypertrophy, replacement fibrosis and interstitial fibrosisP704Multimodality imaging and genotype-phenotype associations in a cohort of patients with hypertrophic cardiomyopathy studied by next generation sequencing and cardiac magnetic resonanceP705Sudden cardiac death risk assessment in apical hypertrophic cardiomyopathy: do we need to add MRI to the equation?P706Prognostic value of left ventricular ejection fraction, proBNP, exercise capacity, and NYHA functional class in patients with left ventricular non-compaction cardiomyopathyP707The anti-hypertrophic microRNAs miR-1, miR-133a and miR-26b and their relationship to left ventricular hypertrophy in patients with essential hypertensionP708Prevalence of left ventricular systolic dysfunction in a portuguese population of left ventricular non-compaction cardiomyopathy, a multicentre studyP709Assessment of systolic and diastolic features in light chain amyloidosis: an echocardiographic and cardiac magnetic resonance studyP710Morbid obesity-associated hypertension identifies bariatric surgery best responders: Clinical and echocardiographic follow up studyP711Echocardiographic markera for overhydration in patients under haemodialysisP712Gender aspects of right ventricular size and function in clinically stable heart transplant patientsP713Evidence of cardiac stem cells from the left ventricular apical tip in patients undergone LVAD implant: a comparative strain-ultrastructural studySystemic diseases and other conditionsP714Speckle tracking assessment of right ventricular function is superior for differentiation of pressure versus volume overloaded right ventricleP715Prognostic value of pulmonary arterial pressure: analysis in a large dataset of timely matched non-invasive and invasive assessmentsP716Effect of the glucagon-like peptide-1 analogue liraglutide on left ventricular diastolic and systolic function in patients with type 2 diabetes: a randomised, single-blinded, crossover pilot studyP717Tissue doppler evaluation of left ventricular functions, left atrial mechanical functions and atrial electromechanical delay in juvenile idiopathic arthritisP718Echocardiographic detection of subclinical left ventricular dysfunction in patients with rheumatoid arthritisP719Left ventricular strain values are unaffected by intense training: a longitudinal, speckle-tracking studyP720Diastolic left ventricular function in autosomal dominant polycystic kidney disease: a matched-cohort, speckle-tracking echocardiographic studyP721Relationship between adiponectin level and left ventricular mass and functionP722Left atrial function is impaired in patients with multiple sclerosisMasses, tumors and sources of embolismP723Paradoxical embolization to the brain in patients with acute pulmonary embolism and confirmed patent foramen ovale with bidirectional shunt, results of prospective monitoringP724Following the European Society of Cardiology proposed echocardiographic algorithm in elective patients with clinical suspicion of infective endocarditis: diagnostic yield and prognostic implicationsP725Metastatic cardiac18F-FDG uptake in patients with malignancy: comparison with echocardiographic findingsDiseases of the aortaP726Echocardiographic measurements of aortic pulse wave velocity correlate well with invasive methodP727Assessment of increase in aortic and carotid intimal medial thickness in adolescent type 1 diabetic patientsStress echocardiographyP728Determinants and prognostic significance of heart rate variability in renal transplant candidates undergoing dobutamine stress echocardiographyP729Pattern of cardiac output vs O2 uptake ratio during maximal exercise in heart failure with reduced ejection fraction: pathophysiological insightsP730Prognostic value and predictive factors of cardiac events in patients with normal exercise echocardiographyP731Right ventricular mechanics during exercise echocardiography: normal values, feasibility and reproducibility of conventional and new right ventricular function parametersP732The added value of exercise-echo in heart failure patients: assessing dynamic changes in extravascular lung waterP733Applicability of appropriate use criteria of exercise stress echocardiography in real-life practice: what have we improved with new documents?Transesophageal echocardiographyP7343D-TEE guidance in percutaneous mitral valve interventions correcting mitral regurgitationContrast echocardiographyP735Pulmonary transit time by contrast enhanced ultrasound as parameter for cardiac performance: a comparison with magnetic resonance imaging and NT-ProBNPReal-time three-dimensional TEEP736Optimal parameter selection for anisotropic diffusion denoising filters applied to aortic valve 4d echocardiographsP737Left ventricle systolic function in non-alcoholic cirrhotic candidates for liver transplantation: a three-dimensional speckle-tracking echocardiography studyTissue Doppler and speckle trackingP738Optimizing speckle tracking echocardiography strain measurements in infants: an in-vitro phantom studyP739Usefulness of vascular mechanics in aortic degenerative valve disease to estimate prognosis: a two dimensional speckle tracking studyP740Vascular mechanics in aortic degenerative valve disease: a two dimensional speckle-tracking echocardiography studyP741Statins and vascular load in aortic valve disease patients, a speckle tracking echocardiography studyP742Is Left Bundle Branch Block only an electrocardiographic abnormality? Study of LV function by 2D speckle tracking in patients with normal ejection fractionP743Dominant inheritance of global longitudinal strain in a population of healthy and hypertensive twinsP744Mechanical differences of left atria in paroxysmal atrial fibrillation: A speckle-tracking study.P745Different distribution of myocardial deformation between hypertrophic cardiomyopathy and aortic stenosisP746Left atrial mechanics in patients with chronic renal failure. Incremental value for atrial fibrillation predictionP747Subclinical myocardial dysfunction in cancer patients: is there a direct effect of tumour growth?P748The abnormal global longitudinal strain predicts significant circumflex artery disease in low risk acute coronary syndromeP7493D-Speckle tracking echocardiography for assessing ventricular funcion and infarct size in young patients after acute coronary syndromeP750Evaluation of left ventricular dyssynchrony by echocardiograhy in patients with type 2 diabetes mellitus without clinically evident cardiac diseaseP751Differences in myocardial function between peritoneal dialysis and hemodialysis patients: insights from speckle tracking echoP752Appraisal of left atrium changes in hypertensive heart disease: insights from a speckle tracking studyP753Left ventricular rotational behavior in hypertensive patients: Two dimensional speckle tracking imaging studyComputed Tomography & Nuclear CardiologyP754Effectiveness of adaptive statistical iterative reconstruction of 64-slice dual-energy ct pulmonary angiography in the patients with reduced iodine load: comparison with standard ct pulmonary angiograP755Clinical prediction model to inconclusive result assessed by coronary computed tomography angiography. Eur Heart J Cardiovasc Imaging 2015. [DOI: 10.1093/ehjci/jev277] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
13
|
Fine and ultrafine particles in small cities. A case study in the south of Europe. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2015; 22:18477-86. [PMID: 26278902 DOI: 10.1007/s11356-015-5165-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2014] [Accepted: 08/06/2015] [Indexed: 05/07/2023]
Abstract
Ultrafine particles, PM2.5 and PM10 mass concentration, NO(x), Ozone, SO2, back-trajectories of air masses and meteorological parameters were studied in a small city over the period February, 2013 to June, 2014. The profiles of PM2.5 and PM10 particles are provided, showing averaged values of 16.6 and 21.6 μg m(-3), respectively. The average number concentration of particles in the range of diameters 5.6-560 nm was 1.2 × 10(4)#/ cm(3) with contributions of 42, 51 and 7% from the nucleation, Aitken, and accumulation modes, respectively. The average number concentration of ultrafine particles was 1.1 × 10(4)#/ cm(3). The results obtained are evidence for some differences in the pollution of ambient air by particles in the studied town in comparison to bigger cities. Nucleation events due to emissions from the city were not observed, and traffic emissions amount to a small contribution to PM2.5 and PM10 particles which are mainly due to crustal origin from the arid surroundings and long-range transport from the Sahara Desert.
Collapse
|
14
|
Influence of age on IgE response in peanut-allergic children and adolescents from the Mediterranean area. Pediatr Allergy Immunol 2015; 26:497-502. [PMID: 26046378 DOI: 10.1111/pai.12418] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 05/28/2015] [Indexed: 11/30/2022]
Abstract
BACKGROUND Peanut allergens are common triggers of food allergy. Analyses of sensitization patterns, relationships with other allergens, clinical symptoms, and variation with age are needed. We studied sensitization to Ara h 2, Ara h 9, and Pru p 3 in a peanut allergic children/adolescents and the relationship with peach and pollen. METHODS Peanut allergic patients aged between 1 and 20 years old were classified into two groups: A) allergic to peanut only and B) allergic to peach and peanut. The IgE response was measured to Ara h 2, Ara h 9, and Pru p 3. RESULTS Of 964 subjects evaluated, 28% were allergic to peanut. From this group, 68% were also sensitized to pollen. Urticaria was the most frequent entity followed by anaphylaxis and OAS. Fifty-eight percent had Ara h 2- and/or Ara h 9-specific IgE. More than half reported symptoms with peanut alone (Group A) and 35% to peanut and peach (Group B). We observed significant differences in sex, age, onset of symptoms, and sensitization to Artemisia between groups. IgE response to Ara h 2 was more frequent in Group A, and Ara h 9 and Pru p 3 in Group B. We observed a decrease in sensitization to Ara h 2 and an increase to Ara h 9 and Pru p 3 with increasing age. CONCLUSION Peanut allergy is frequent in subjects with allergy to plant foods, with Ara h 2 and Ara h 9 being two important allergens. In younger patients, Ara h 2 predominates over Ara h 9. The reverse was observed in older patients.
Collapse
|
15
|
Mitochondria inheritance is a key factor for tolerance to dehydration in wine yeast production. Lett Appl Microbiol 2014; 60:217-22. [DOI: 10.1111/lam.12369] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2014] [Revised: 10/24/2014] [Accepted: 11/11/2014] [Indexed: 01/06/2023]
|
16
|
Basophil response to peanut allergens in Mediterranean peanut-allergic patients. Allergy 2014; 69:964-8. [PMID: 24816395 DOI: 10.1111/all.12421] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/29/2014] [Indexed: 11/30/2022]
Abstract
Ara h 1, Ara h 2, and Ara h 3 are important sensitizers in peanut allergy. Ara h 9 has also been shown to be relevant in the Mediterranean area. We evaluated the basophil response to peanut allergens and Pru p 3 in Mediterranean patients: Group 1, peanut and peach allergy; Group 2, peanut allergy and tolerance to peach; Group 3, peach allergy and tolerance to peanut; Group 4, nonallergic subjects that tolerate both peanut and peach. Compared to controls (Group 4), there was an increased basophil activation with Ara h 2 (P = 0.031) and Pru p 3 (P = 0.009) in Group 1 and with Ara h 1 (P = 0.016), Ara h 2 (P = 0.001), and Ara h 9 (P = 0.016) in Group 2. Importantly, only Ara h 2 showed an increased activation (P = 0.009) in Group 2 compared to Group 3. Ara h 2 is the best discriminating allergen for peanut allergy diagnosis in a Mediterranean population showing two patterns: patients also allergic to peach, responding to Ara h 2 and Pru p 3, and patients allergic only to peanut, responding to Ara h 1, Ara h 2, and Ara h 9.
Collapse
|
17
|
Taquicardias de complejo QRS ancho precedidas de espiga de marcapasos. Semergen 2014; 40:e57-9. [DOI: 10.1016/j.semerg.2013.02.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2012] [Revised: 01/30/2013] [Accepted: 02/01/2013] [Indexed: 10/26/2022]
|
18
|
Diagnosis of immediate hypersensitivity reactions to radiocontrast media. Allergy 2013; 68:1203-6. [PMID: 23991759 DOI: 10.1111/all.12214] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/28/2013] [Indexed: 11/29/2022]
Abstract
BACKGROUND No consensus exists on the diagnostic approach for immediate hypersensitivity reactions (IHR) to radiocontrast media (RCM). We analyzed the diagnostic value of a skin test (ST), drug provocation test (DPT) and basophil activation test (BAT) in patients with symptoms compatible with IHR to RCM. METHODS Ninety patients with symptoms suggestive of IHR to RCM were evaluated. ST with a panel of RCM was performed, and if negative, DPT was carried out with the culprit RCM. If ST or DPT were positive, tolerance was assessed with an alternative RCM and BAT was carried out with the same panel used for ST. RESULTS Eight (8.9%) cases were confirmed as having IHR, 5 (62.5%) by ST and 3 (37.5%) by DPT. Five from those confirmed as IHR (62.5%) had a positive BAT. CONCLUSIONS Hypersensitivity to RCM was confirmed in 9%, by ST or DPT. BAT proved a valuable method for diagnosis.
Collapse
|
19
|
Design of dendrimeric structures to treat allergic disorders. Clin Transl Allergy 2013. [PMCID: PMC3723477 DOI: 10.1186/2045-7022-3-s3-p81] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
|
20
|
Basophil response to peanut allergens in the mediterranean area. Clin Transl Allergy 2013. [PMCID: PMC3723514 DOI: 10.1186/2045-7022-3-s3-p167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
|
21
|
Dichloro-dihydro-fluorescein diacetate (DCFH-DA) assay: A quantitative method for oxidative stress assessment of nanoparticle-treated cells. Toxicol In Vitro 2013; 27:954-63. [DOI: 10.1016/j.tiv.2013.01.016] [Citation(s) in RCA: 251] [Impact Index Per Article: 22.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2012] [Revised: 10/24/2012] [Accepted: 01/11/2013] [Indexed: 10/27/2022]
|
22
|
Multihormonal control of proliferation and cytosolic glycerol phosphate dehydrogenase, lactate dehydrogenase and malic enzyme in glial cells in culture. Neurochem Int 2012; 9:247-53. [PMID: 20493123 DOI: 10.1016/0197-0186(86)90060-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/1985] [Accepted: 02/10/1986] [Indexed: 11/25/2022]
Abstract
We have examined the effect of a physiological concentration of l-triiodothyronine on the activity of cytosolic enzymes in the C6 rat glioma cell line. l-Triiodothyronine decreased glycerol phosphate dehydrogenase activity. This effect seems to be rather specific, since l-triiodothyronine did not change malic enzyme or lactate dehydrogenase activity and did not alter the amount of either cytosolic or total cell protein. Dexamethasone greatly increased glycerol phosphate dehydrogenase and l-triiodothyronine also decreased the response to the glucocorticoid. Noradrenaline or dibutyryl cyclic AMP potentiated the dexamethasone-induced specific activity of this enzyme, and l-triiodothyronine lowered the response to the combined effects of these agents. The effect of l-triiodothyronine is not restricted to the C6 cells, since it also decreased basal glycerol phosphate dehydrogenase activity in primary cultures of cells dissociated from brains of embryonic mice. The results indicate that thyroid hormones have a direct effect on the modulation of cytosolic glycerol phosphate dehydrogenase in cultured cells of glial origin.
Collapse
|
23
|
Sensitization To Multiple Woods Caused By An Ige-mediated Mechanism. J Allergy Clin Immunol 2012. [DOI: 10.1016/j.jaci.2011.12.393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
|
24
|
Immunoglobulin E-mediated hypersensitivity to amoxicillin: in vivo and in vitro comparative studies between an injectable therapeutic compound and a new commercial compound. Clin Exp Allergy 2011; 41:1595-601. [DOI: 10.1111/j.1365-2222.2011.03834.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
25
|
Analysis of Aeroallergens and Volatile Organic Compounds using air purifiers in relation to inhalant allergy cases at Coulter Animal Hospital. J Allergy Clin Immunol 2011. [DOI: 10.1016/j.jaci.2010.12.185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
26
|
Characteristics of a Novel Allergen of Samba Wood. J Allergy Clin Immunol 2011. [DOI: 10.1016/j.jaci.2010.12.704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
27
|
Abstract
BACKGROUND Hypersensitivity IgE-mediated reactions to quinolones are not easy to diagnose, with skin testing inducing false positive results. The aim of the study was to evaluate the in vitro-specific IgE response in patients with immediate allergic reactions to quinolones. METHODS We evaluated 38 patients with confirmed immediate allergic reactions to quinolones. Those with anaphylaxis were considered allergic by clinical history, once other possible causes were ruled out, and those with urticaria by drug provocation. Sepharose-radioimmunoassay (RIA) and basophil activation test (BAT) with ciprofloxacin, moxifloxacin and levofloxacin were performed. RESULTS The quinolones involved were moxifloxacin (N = 24), ciprofloxacin (N = 11) and levofloxacin (N = 3). Sepharose-RIA was positive in 12 cases (31.57%) and BAT in 27 (71.05%). With Sepharose-RIA, 8 (21%) were positive to ciprofloxacin, 7 (18.4%) to moxifloxacin and 7 (18.4%) to levofloxacin. With BAT, 23 (60.5%) were positive to ciprofloxacin, 12 (31.6%) to moxifloxacin and 8 (21%) to levofloxacin. The specificity of the Sepharose-RIA was demonstrated by inhibition tests. To confirm that the BAT results observed were IgE mediated, the PI3K inhibitor wortmannin was used, with this compound inhibiting the BAT when stimulated with anti-IgE and the different quinolones, but not when fMLP was used as the basophil stimulator. Sepharose-RIA and BAT were repeated in positive cases 1 year later, detecting a decrease in all cases, with four becoming negative. CONCLUSION Immediate hypersensitivity reactions to quinolones do occur, with moxifloxacin being the drug most frequently involved. The BAT is a useful method for diagnosing patients. Specific IgE was demonstrated by Sepharose-RIA and inhibition assay.
Collapse
|
28
|
Natural killer-dendritic cell interaction in lymphocyte responses in hypersensitivity reactions to betalactams. Allergy 2010; 65:1600-8. [PMID: 20716322 DOI: 10.1111/j.1398-9995.2010.02459.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
BACKGROUND Betalactams are the commonest cause of allergic reactions mediated by either IgE or T lymphocytes in which innate and adaptive immune systems mediate the earlier stages of immunological responses. One of the links between these systems is related to the interaction between natural killer (NK) and dendritic cells (DC). We have evaluated the role of NK cells and NK-DC interaction in the immunopathological mechanisms of nonimmediate reactions to betalactams. METHODS Patients allergic to amoxicillin (AX) (N = 17) and tolerant controls (N = 13) were included. Changes in phenotype (CD69, IFNγ, perforin, and granzyme B) in AX-stimulated NK cells, the cytotoxic activity on mature or immature DC (imDC), and the proliferation and phenotype of NK lymphocytes after culture with AX and DC were determined by flow cytometry. RESULTS Amoxicillin induced activation and increases of perforin and granzyme B (P = 0.007 and P = 0.041 respectively) but not IFNγ production in NK cells from patients. In NK subpopulations, AX induced a significant enhancement of perforin and granzyme B in CD56(dim) (P = 0.005 and P = 0.002 respectively) and of IFNγ in CD56(bright) (P = 0.001). The cytotoxic phenotype was demonstrated by an increase of annexin V only in imDC (P < 0.001). Amoxicillin also induced an increased NK proliferation with different patterns, cytotoxic or proinflammatory, depending on the presence of imDC or mature DC, respectively. No differences were observed in NK cells from tolerant controls. CONCLUSION These data could demonstrate the involvement of NK cells in the immunopathological mechanisms of nonimmediate allergic reactions to AX, showing that both the innate and adaptive immune systems are involved and crosstalk, producing amplification of the harmful effects observed in these drug reactions.
Collapse
|
29
|
Abstract
BACKGROUND Allergic reactions to systemically administered corticosteroids seem to be infrequent considering their extensive use. The aim of the study was to evaluate the IgE response in patients with immediate allergic reactions to methylprednisolone (MP). METHODS Four subjects who developed immediate reactions after MP administration and ten controls with good tolerance to MP administration were evaluated. Skin prick and intradermal testing were done using MP, hydrocortisone (HC), and dexamethasone (DX). If negative, a drug provocation test (DPT) was done to confirm the diagnosis and assess cross-reactivity. The in vitro IgE response was evaluated by the basophil activation test (BAT) and ImmunoCAP. RESULTS Three patients were diagnosed by the presence of a positive skin test in the immediate reading with MP, two by prick and one by intradermal testing, and one patient was skin test negative and diagnosed by DPT. All four patients had good tolerance to HC and DX. The BAT was positive for just MP in those patients with positive skin tests, with all patients being negative for HC and DX. Two patients were also ImmunoCAP positive to MP. CONCLUSIONS This study confirms the existence of immediate allergic reactions to MP and that some are mediated by specific IgE antibodies. Skin testing, ImmunoCAP and the BAT are useful to confirm the diagnosis.
Collapse
|
30
|
Synchronizing Effect of Photoperiod on the Dual Phasing of Demand-Feeding Rhythms in Sea Bass. BIOL RHYTHM RES 2010. [DOI: 10.1076/brhm.30.4.392.1409] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
31
|
Metabolic characterization of PB60 and PB65, two peptidomimetics which notably facilitate the transport of heparin across the intestinal barrier. An activity of the Melius project. Toxicol Lett 2010. [DOI: 10.1016/j.toxlet.2010.03.893] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
32
|
Assessment of the inhibition on major human CYP450 isoforms as a predictor of putative interaction on concomitantly administered drugs for a new compound under development. An activity of the Melius project. Toxicol Lett 2010. [DOI: 10.1016/j.toxlet.2010.03.891] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
33
|
Basophil Activation Test For Evaluating Immediate Allergic Reactions To Quinolones. J Allergy Clin Immunol 2010. [DOI: 10.1016/j.jaci.2009.12.617] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
34
|
Atopy, Specific Sensitization and Respiratory Symptoms In Apprentices of Furniture Industry Exposed to Diisocyanates And Wood Dust. J Allergy Clin Immunol 2010. [DOI: 10.1016/j.jaci.2009.12.469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
35
|
IgE-Mediated Hypersensitivity Reactions To Methylprednisolone. J Allergy Clin Immunol 2010. [DOI: 10.1016/j.jaci.2009.12.597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
36
|
Ubiquitin ligase Rsp5p is involved in the gene expression changes during nutrient limitation in Saccharomyces cerevisiae. Yeast 2009; 26:1-15. [PMID: 19180642 DOI: 10.1002/yea.1645] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
Rsp5p is an essential ubiquitin ligase involved in many different cellular events, including amino acid transporters degradation, transcription initiation and mRNA export. It plays important role in both stress resistance and adaptation to the change of nutrients. We have found that ubiquitination machinery is necessary for the correct induction of the stress response SPI1 gene at the entry of the stationary phase. SPI1 is a gene whose expression is regulated by the nutritional status of the cell and whose deletion causes hypersensitivity to various stresses, such as heat shock, alkaline stress and oxidative stress. Its regulation is mastered by Rsp5p, as mutations in this gene lead to a lower SPI1 expression. In this process, Rsp5p is helped by several proteins, such as Rsp5p-interacting proteins Bul1p/2p, the ubiquitin conjugating protein Ubc1p and ubiquitin proteases Ubp4p and Ubp16p. Moreover, a mutation in the RSP5 gene has a global effect at the gene expression level when cells enter the stationary phase. Rsp5p particularly controls the levels of the ribosomal proteins mRNAs at this stage. Rsp5p is also necessary for a correct induction of p-bodies under stress conditions, indicating that this protein plays an important role in the post-transcriptional fate of mRNA under nutrient starvation.
Collapse
|
37
|
Basophil Activation Test in Patients with Immediate Allergic Reactions to NSAIDs. J Allergy Clin Immunol 2009. [DOI: 10.1016/j.jaci.2008.12.523] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
38
|
Work-related Respiratory Symptoms and Sensitization in Wood Work Apprentices. J Allergy Clin Immunol 2009. [DOI: 10.1016/j.jaci.2008.12.1033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
39
|
Abstract
Histone deacetylases (HDACs) remove the acetyl groups of lysine residues of histone tails leading to chromatin compaction and transcriptional repression. In addition, HDACs can also influence transcription-independent events such as mitosis or deoxyribonucleic acid (DNA) repair and deacetylate nonhistone proteins involved in cell proliferation and death, altering their function. Histone deacetylase inhibitors (HDACi) constitute a promising treatment for cancer therapy due to their low toxicity. HDACi have been shown to induce differentiation, cell-cycle arrest, and apoptosis and to inhibit migration, invasion, and angiogenesis in many cancer cell lines. In addition, these compounds inhibit tumor growth in animal models and show antitumor activity in patients. HDACi alone and in combination with a variety of anticancer drugs are being tested in clinical trials, showing significant anticancer activity both in hematological and solid tumors. SAHA (vorinostat, Zolinza) was the first HDACi approved by the US Food and Drug Administration to enter the clinical oncology market for treating cutaneous T-cell lymphoma (CTCL) and is being tested for other malignancies.
Collapse
|
40
|
Abstract
BACKGROUND There are few reports in the literature on the use of a laparoscopic approach for duodenal obstruction, particularly for duodenal atresia. We report here the results of 4 cases treated laparoscopically, and discuss the safety, feasibility and long-term results of this approach. PATIENTS AND METHODS Four pediatric patients presented with duodenal obstruction, one with duodenal atresia, one with annular pancreas, and two with duodenal obstruction due to Ladd's bands but without malrotation. Diagnosis was made by clinical evaluation, simple X-ray film in the Ladd's patients, and contrast gastroduodenal X-ray series for the annular pancreas. All procedures were performed using 3-mm instruments and 3 trocars. Two duodeno-duodenal anastomoses were performed and two lyses of Ladd's bands; all procedures were carried out laparoscopically. RESULTS An upper GI contrast excluded obstruction or leakage in all patients 5 - 7 days after surgery and feedings were started. The patient with annular pancreas died of cardiovascular complications after one months. The other 3 patients are asymptomatic and tolerating feedings after a follow-up of 36 months. CONCLUSIONS We conclude that a laparoscopic approach for duodenal obstruction can be performed safely and effectively and achieves a short hospital stay. Laparoscopic lysis of Ladd's bands is easy to perform, but duodenoduodenostomy requires advanced laparoscopic skills.
Collapse
|
41
|
|
42
|
The thyroid hormone receptor b1 act as a potent suppressor of tumor invasiveness and metastasis. EJC Suppl 2008. [DOI: 10.1016/s1359-6349(08)71329-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
|
43
|
A - 3 Évaluation des connaissances et des pratiques sur la prise en charge en urgence de l’état de mal épileptique généralisé de l’adulte. Rev Neurol (Paris) 2007. [DOI: 10.1016/s0035-3787(07)90768-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
44
|
Epigenetic disruption of ribosomal RNA genes and nucleolar architecture in DNA methyltransferase 1 (Dnmt1) deficient cells. Nucleic Acids Res 2007; 35:2191-8. [PMID: 17355984 PMCID: PMC1874631 DOI: 10.1093/nar/gkm118] [Citation(s) in RCA: 102] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2006] [Revised: 02/08/2007] [Accepted: 02/09/2007] [Indexed: 12/15/2022] Open
Abstract
The nucleolus is the site of ribosome synthesis in the nucleus, whose integrity is essential. Epigenetic mechanisms are thought to regulate the activity of the ribosomal RNA (rRNA) gene copies, which are part of the nucleolus. Here we show that human cells lacking DNA methyltransferase 1 (Dnmt1), but not Dnmt33b, have a loss of DNA methylation and an increase in the acetylation level of lysine 16 histone H4 at the rRNA genes. Interestingly, we observed that SirT1, a NAD+-dependent histone deacetylase with a preference for lysine 16 H4, interacts with Dnmt1; and SirT1 recruitment to the rRNA genes is abrogated in Dnmt1 knockout cells. The DNA methylation and chromatin changes at ribosomal DNA observed are associated with a structurally disorganized nucleolus, which is fragmented into small nuclear masses. Prominent nucleolar proteins, such as Fibrillarin and Ki-67, and the rRNA genes are scattered throughout the nucleus in Dnmt1 deficient cells. These findings suggest a role for Dnmt1 as an epigenetic caretaker for the maintenance of nucleolar structure.
Collapse
|
45
|
[Electrical manifestations of dead myocardium associated to proximal blocks of intermediate degree]. ARCHIVOS DE CARDIOLOGIA DE MEXICO 2007; 77:67-73. [PMID: 17500195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/15/2023] Open
Abstract
The electrical manifestation of dead myocardium associated to incomplete bundle branch block, i.e., with a limited "jumping wave" phenomenon, are exposed. Our description is based on previous experimental studies and validated by electro-anatomical comparisons. In previous experimental reports, the electrical manifestations of dead myocardium in the presence of varying degrees of associated block have also been described. The main electrocardiographic changes are related to the location and extent of damaged region and to degree of bundle branch block. If a left bundle branch block coexists with dead myocardium, small Q waves are registered in left unipolar leads exploring the damaged area. In these leads, the signs of subepicardial or transmural injury are increased. When a right proximal block coexists, the main changes concern the morphologies registered in the unipolar right epicardial and precordial leads. The electrical changes are due to the spatial orientation of the electromotive forces of ventricular depolarization and repolarization. The electrocardiographic changes described here can be satisfactorily understood in the light of the present knowledge on the ventricular electrical phenomenon.
Collapse
|
46
|
Combination Therapy With Sildenafil and Bosentan Reverts Severe Pulmonary Hypertension and Allows Heart Transplantation: Case Report. Transplant Proc 2006; 38:2522-3. [PMID: 17097987 DOI: 10.1016/j.transproceed.2006.08.074] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
INTRODUCTION Severe pulmonary hypertension with no response to vasodilators on an acute hemodynamic study is a contraindication to cardiac transplantation. The development of oral pulmonary vasodilators improves the prognosis in these patients. We present the case of a patient whose admission to the waiting list for cardiac transplantation was possible after 6 months of combination therapy with Sildenafil and Bosentan. CASE REPORT The patient was a 50-year-old man with severe dilated alcohol-induced cardiomyopathy. A pretransplantation study, including a right hemodynamic analysis, revealed irreversible pulmonary hypertension, with 59 mm Hg mean pulmonary artery pressure and 6.4 Wood IU pulmonary vascular resistance, with no response to acute vasodilators with nitric oxide or prostacyclin. Initially, heart transplantation was not possible and the patient started treatment with oral Sildenafil. After 6 months there was no improvement in echocardiographic or hemodynamic parameters, and combination therapy with Bosentan was started. With the combination therapy, the patient progressively improved clinically and hemodynamically, the pressures becoming normal at the sixth month, at which time he was included on the waiting list for a heart transplantation. Eight months later he received a graft with a good posttransplantation course, no right ventricular failure in the acute phase, and absence of pulmonary hypertension on echocardiogrphic and invasive studies. CONCLUSION Combinations of an oral pulmonary vasodilator with diverse action mechanisms may represent an alternative for patients with irreversible pulmonary hypertension who do not respond to monotherapy.
Collapse
|
47
|
[Nutrients and energy intake assessment in the critically ill patient on enteral nutritional therapy]. NUTR HOSP 2005; 20:110-4. [PMID: 15813394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2023] Open
Abstract
INTRODUCTION AND OBJECTIVES The critically ill patient is especially susceptible to malnutrition due to his/her hypermetabolic state that leads to an increase in the nutritional requirementes, which many times are not compensated with the administered enteral formulas. The assessment of nutritional intake is essential in this kind of patients to know to what level their energetic and nutritional requirements are fulfilled, improving and monitoring in the most individualized possible way to indicated clinical and nutritional therapu. METHODOLOGY This is a retrospective study in which all patients admitted to the Intensive Care Unit of Virgen de las Nieves Hospital were studied from January to December of 2003, aged more than 18 years, and on enteral nutrition. A total of 90 patients (52 men and 38 women) were studied, 81% of which were older than 50 years, and 57% had hospital stays longer than 8 days, with a 21% mortality rate. Intake was assessed from time of admission and throughout the whole hospitalization period. Energetic requirements were calculated according to the modified Long's formula and micronutrients intakes were compared to existing general recommendations for the Spanish, European and American populations, and to vitaminic requirements in critically ill patients. RESULTS Percentages of mean energy and nutrients intakes in relation to theoretical calculated requirements for both genders are presented in figure 1. Mean energy intake was 1,326 cal in men and 917 cal in women. With regards to micronutrients intake, the values found for proteins, falts, and carbohydrates were lower than 50% of the requirements for both genders. The percentage of adequacy as referred to requirements for vitamins and minerals intake is shown in figure 2. Reference recommendations used correspond to sufficient intakes to cover the healthy individual requirements, therefore, the values obtained in our study show and adequacy greater than 75%, with the exception of particular elements such as vitamin A and magnesium. However, by taking a look at figure 3, which shows the adequacy of vitamins intake at recommended does for sick patients, the intake is lower than 25% of the requirements in all cases, and these deficiencies significantly interfere with wound healing, the immune, cardiovascular and nervous systems, as well as with metabolism of the remaining macronutrients leading to an unbalanced situation of the antioxidant system, worsening the patient's clinical status. CONCLUSIONS The present study confirms the need for monitoring individually the nutritional requirements in the critically ill patient and adapting recommendations to his/her metabolic changes, since currently these recommendations are not clearly defined for these situations. It is necessary to provide micronutrients doses closer to the patient's demands, so that the nutritional status and the balance of the antioxidant system may be preserved or improved, making the adopted clinical treatment more effective.
Collapse
|
48
|
Determination of chloramphenicol residues in shrimps by liquid chromatography-mass spectrometry. J Chromatogr B Analyt Technol Biomed Life Sci 2003; 791:31-8. [PMID: 12798162 DOI: 10.1016/s1570-0232(03)00186-7] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
A liquid chromatographic method with mass spectrometric detection and identification (LC-MS) is presented for the determination of chloramphenicol (CAP) in shrimp tissues. Homogenized shrimp samples were extracted with phosphate buffer (pH 7.0). Clean-up was carried out on a C(18) SPE cartridge. Chloramphenicol was determined by LC-MS-ESI in negative mode. The column used was a Symmetry Shield with a mixture of acetonitrile-water (25:75) as mobile phase. Shrimp samples were fortified at CAP levels between 0.2 and 50 ng g(-1) with 5D-CAP as internal standard. At these levels, accuracies lay between 101 and 110% and between-day reproducibilities were lower than 7.1%, expressed as the variation coefficient of the mean. Limit of decision (CCalpha) was 0.02 ng g(-1). Limit of quantitation (LOQ) was 0.2 ng g(-1).
Collapse
|
49
|
Gas-Phase Reactions of Chlorine Atoms and ClO Radicals with Dimethyl Sulfide. Rate Coefficients and Temperature Dependences. J Phys Chem A 2002. [DOI: 10.1021/jp014570c] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
50
|
Interaction of vitamin D and retinoid receptors on regulation of gene expression. HORMONE RESEARCH 2002; 54:301-5. [PMID: 11595822 DOI: 10.1159/000053276] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Vitamin D and retinoic acid (RA) receptors (VDRs and RARs, respectively), bind as heterodimers with the retinoid X receptor (RXR) to hormone response elements (HREs) in target genes. In some cases RA and vitamin D can cooperate to stimulate transcription through the same HRE. However, VDR/RXR heterodimers bind in a transcriptionally unproductive manner and without a defined polarity on certain RA response elements, and under these circumstances vitamin D inhibits the response to RA. Although competition for binding to DNA may contribute to this inhibitory response, titration of common coactivators by VDR also appears to be involved in transrepression. Therefore, the transcriptional response to RA and vitamin D depends on a complex combinatory pattern of interaction among different receptors wih DNA and coactivators.
Collapse
|